Index: tracing/tracing/ui/tracks/drawing_container.html |
diff --git a/tracing/tracing/ui/tracks/drawing_container.html b/tracing/tracing/ui/tracks/drawing_container.html |
index 7fc1653e565333e0339e3ead92194e4e45cda292..e3937671b8be0b47f9ee374e9c369715e00d0dee 100644 |
--- a/tracing/tracing/ui/tracks/drawing_container.html |
+++ b/tracing/tracing/ui/tracks/drawing_container.html |
@@ -112,6 +112,10 @@ tr.exportTo('tr.ui.tracks', function() { |
var visibleChildTracks = |
tr.b.asArray(this.children).filter(this.visibleFilter_); |
+ if (visibleChildTracks.length === 0) { |
+ return; |
+ } |
+ |
var thisBounds = this.getBoundingClientRect(); |
var firstChildTrackBounds = visibleChildTracks[0].getBoundingClientRect(); |